HP HPE Alletra 2140 Hardware Manual page 61

Note: Ensure that all drives are detected and all drive LEDs are green before activating the expansion shelf.
Activation will fail if any drives are missing or have failed.
a) In the array GUI, click Hardware, then select the array that contains the new drives.
b) In the array list, click the array that manages the expansion shelf.
c) On the expansion shelf graphic, click Activate.
When the activation completes, the expansion shelf appears on the Array Management page.
CAUTION:
When you activate the expansion shelf, there is a momentary pause in data services from the array. You might
need to activate the expansion shelf during a maintenance window.
5. Snap the bezel to the front of expansion shelf.
The bezel is the front plate that attaches to the front of the array to control airflow. The bezel includes retention pins on
both sides.
a) Align the four retention pins on the bezel with the four mounting holes on the front of the chassis.
b) Press gently but firmly until the bezel snaps into place.
1 Bezel 2 Chassis
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Install the Expansion Shelf 61